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River-lake silt deep dehydrant and dehydration method

A deep dewatering and silting technology, applied in the field of environmental engineering, can solve the problems of large amount of chemicals added, high disposal cost, low dewatering efficiency, etc., and achieve the effects of enhancing floc strength, reducing energy consumption, and improving dewatering efficiency.

Inactive Publication Date: 2017-06-20
INST OF ROCK AND SOIL MECHANICS - CHINESE ACAD OF SCI +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The invention provides a deep dehydrating agent and dehydration method for river and lake sludge, which solves the technical problems of long dehydration, flocculation and settling time of river and lake sludge, low dehydration efficiency, large dosage of chemicals, and high disposal cost in the prior art

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0055] Select 1 ton of river and lake sludge with a water content of 200%, and determine the mass ratio of 3.45% to add the river and lake sludge deep dehydrating agent, that is, the total amount of river and lake sludge deep dehydrating agent is 34.50kg. After calculation, organic polymer flocculant, inorganic polymer The mass of flocculant and auxiliary agent is 3.45kg, 3.45kg and 27.60kg.

[0056] The calculated adjuvant mass is 27.60kg. Among them, the mass of straw powder is 8.28kg, the mass of fly ash is 8.28kg, the mass of quicklime is 8.28kg, and the mass of talcum powder is 2.76kg. Add auxiliary agent to the determined 1t of sludge to be dehydrated, stir for 3 to 5 minutes until uniform, and form the first mixture.

[0057] The calculated mass of the inorganic polymer flocculant is 3.45kg. Among them, the mass of polyferric sulfate is 2.415kg, and the mass of polyaluminum sulfate is 1.035kg. Add inorganic polymer flocculant to the first mixture, stir for 3-5 minutes...

Embodiment 2

[0061] Select 1 ton of river and lake sludge with a water content of 300%, and determine the mass ratio of 4.50% to add the river and lake sludge deep dehydrating agent, that is, the total amount of river and lake sludge deep dehydrating agent is 45.00kg. After calculation, the organic polymer flocculant, inorganic polymer The mass of flocculant and auxiliary agent is 4.50kg, 4.50kg and 36.00kg.

[0062] The calculated adjuvant mass is 36.00kg. Among them, the mass of straw powder is 10.80kg, the mass of fly ash is 10.80kg, the mass of quicklime is 10.80kg, and the mass of talcum powder is 3.60kg. Add auxiliary agent to the determined 1t of sludge to be dehydrated, stir for 3 to 5 minutes until uniform, and form the first mixture.

[0063] The calculated mass of the inorganic polymer flocculant is 4.50kg. Among them, the mass of polyferric sulfate is 3.15kg, and the mass of polyaluminum sulfate is 1.35kg. Add inorganic polymer flocculant to the first mixture, stir for 3-5 mi...

Embodiment 3

[0067] Select 1 ton of river and lake sludge with a moisture content of 400%, and determine the mass ratio of 7.10% to add the river and lake sludge deep dehydrating agent, that is, the total amount of river and lake sludge deep dehydrating agent is 71.00kg. After calculation, organic polymer flocculant, inorganic polymer The mass of flocculant and auxiliary agent is 7.10kg, 7.10kg and 56.80kg.

[0068] The calculated adjuvant mass is 56.80kg. Among them, the mass of straw powder is 17.04kg, the mass of fly ash is 17.04kg, the mass of quicklime is 17.04kg, and the mass of talcum powder is 5.68kg. Add auxiliary agent to the determined 1t of sludge to be dehydrated, stir for 3 to 5 minutes until uniform, and form the first mixture.

[0069] The calculated mass of the inorganic polymer flocculant is 7.10kg. Among them, the mass of polyferric sulfate is 4.97kg, and the mass of polyaluminum sulfate is 2.13kg. Add inorganic polymer flocculant to the first mixture, stir for 3-5 min...

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Abstract

Belonging to the technical field of environmental engineering, the invention discloses a river-lake silt deep dehydrant. The river-lake silt deep dehydrant comprises an organic polymeric flocculant, an inorganic polymeric flocculant and an assistant agent. The organic polymeric flocculant includes: cationic polyacrylamide with a molecular weight of 8-12million and animal glue. The inorganic polymeric flocculant includes: polymeric ferric sulfate and polymeric aluminum sulfate. The assistant agent includes: straw powder, fly ash, quick lime and talcum powder. The river-lake silt deep dehydrant and the dehydration method provided by the invention realize deep and efficient dehydration.

Description

technical field [0001] The invention relates to the technical field of environmental engineering, in particular to a deep dehydrating agent for river and lake silt and a dehydrating method. Background technique [0002] The dredging of rivers and lakes produces a large amount of high water content, high organic matter, and even toxic and harmful dredging mud, referred to as silt. How to quickly and effectively "reduce, harmless, stabilize, and recycle" the huge amount of silt has become the key to the smooth implementation of river and lake environmental protection dredging projects. Sludge dewatering is one of the important disposal methods for waste reduction. In order to convert sludge into good engineering materials, reducing the moisture content of sludge is the most direct method. Sludge dehydration technology reduces sludge by chemical and physical methods. Silt is a flocculent and honeycomb structure deposit formed by the deposition of fine particles such as clay ...

Claims

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Application Information

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IPC IPC(8): C02F11/14C02F11/12
CPCC02F11/14C02F11/122C02F2103/007
Inventor 陈亿军薛强刘磊奉向东马骏
Owner INST OF ROCK AND SOIL MECHANICS - CHINESE ACAD OF SCI
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